Famously misunderstood wonder of the ancient world

A walk through the historic city center, under the streets of Seattle.

Towering basalt columns, a creation of fire and ice.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

A sharp bend in a dramatic river canyon cut through red rocks.

A toxic ghost town sitting atop a massive coal fire.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Most-visited and most-photographed slot canyon in the American Southwest.

On the Oregon coast is a natural hole that seems to be draining the sea.

Rippling sand dunes frozen in the Arizona rock.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.